Lubricator



. L. DONOVAN.

LUBRICATOR.

APPLICATION FILED APR. I, I9I9.

Patented Jan. 2?, 1920 INVENTOR l ATTORNEYS LUBRICATOR.

Specification of Letters Patent.

Application led April 1, W19. Serial No. 286,669.

To all 'whom it may concern p Be it known thatI, MICHAEL L. DONOVAN, a citizen of the United States, residing at Omaha, in the county of Douglas and State ofV Nebraska, have invented new and useful Improvements in Lubricators, of which the following is a specification.

My present invention pertains to grease guns, and it contemplates the provision of a" grease gun that may be easily and readily filled and one from which lubricant may be forced with but a small amount of efort on'.

the part of a person practising the invention.

The invention in all of its details will be fully understood from the following description and claims ivhenthe Same are rea-d 1n connection with the drawing accompany* ing and forming part of this specification in The figure illustratesin section a grease gun formed in accordance with my invention. s

As illustrated by the drawings, the grease gun comprises a reservoir or lubricant holding body 2 to which a filling cover 9 is threaded and said body at its lower end is secured on a portion that is gradually reduced in diameter so as to enter of an automobile as indicated by 12.

At its lower end I provide the gun withy a conduit or base portion 1, having, an 1nterior channel 8 that extends throughout the length of the portionl 1.- 'At its upper end said portion 1 is provided with a stepped head member 11. J

As will be seen .by reference to the drawing, the reservoir 2 is interiorly threaded at 4 and said threads extend approximately throughout the length of the reservoir; also the reduced portion 12 is provided with interior threads.

Within the reservoir -2 and immediately above the head 11 of conduit 1 I arrange a.

plate 10 that engages the conduit and threads 4 as illustrated.

I would have it vunderstood duced end 12 of the reservoir may be formed of wood so as to vbe tightly forced into the opening of a bearing of an automobile.

It is further to be understood that the conduit is ,to be interiorly threaded to engage the reduced portion of reservoir'il 2.

In the practical use (of the device when the conduit 1 enters a bearing, the reservoir duit.

a bearing having exterior 2 turned on the plate 10 and head 11 of said conduit, thus causing them to travel upward in the reservoir whereby lubricant will be forced through the channel 8 of the con- When it is desired to refill the reservoir, it is simply necessary to remove the cover 9, when' lubricant may be readily placed in the gun.

'It will be gathered from the foregoing that the reservoir 2 and portion 12 will plate 10 will remain stationary when pressure of the reservoir 2 on the lubricant will force same through channel 8 of said stem 1,

Having described my invention, what claim and desireto secure by Letters-Patent is:

1. In a grease gun, the combination of a reservoir, a conduit having a stepped upper end, a plate mounted on the conduit above the stepped upper end thereof, and meansl on the plate and reservoir for retaining the plate in proper position in said reservoir,

. move upwardly and downwardly in the reservoir and means for permitting lubricant to be placed in the reservoir.

3. In a grease gun, the combination of a reservoir for lubricant having threads, a downwardly tapered portion arranged below the reservoir', and also having interior threads, a conduit having exterior threads that engage the threads of the tapered portion, a stepped upper portion provided on the conduit, and a follower arranged on the stepped upper portion and threads that engage the interior threads of the reservoir whereby the follower is retained in proper relation with respect to the reservoir and whereby also .turning of the reservoir on the conduit will p MICHAEL L. Donovan.

Witnesses CHAnLo'i'rn LoRENzEN,

W, L. BAUGH, Jr.'

interiorA Patented dan.. 27, 1920 move downwardly whereas the stem l and and alling cap` arranged on the reservoir. 

